NCIt definition : An acute leukemia of ambiguous lineage in which there is a dual population of blasts
with each population expressing markers of a distinct lineage (myeloid and lymphoid
or B-and T-lymphocyte). (WHO, 2001);
Alternative definition : NICHD: An acute leukemia in which there is a dual population of blasts with each population
expressing markers of a distinct lineage (myeloid and lymphoid or B-and T-lymphocyte).;